I jsut did a quick look on google and didn't see anything posted regarding other people rebuilding it.
What is your concern with the rebuild? Have you looked into the rebuild kits? Make sure you can find one for the model that Drewpy mentioned. They really are quite easy to rebuild.
If you have trouble getting the piston out there are a couple ways to do it. The easy way to me is to disconnect the caliper with it still connected to the master and pump the brakes till it pops out.
The other method is use abit of compressed air through the bango bolt hole. Make sure you secure a piece of wood so your piston dosen't go flying across the room and be ready for a loud bang.
Now I'm not sure the actual make up of your caliper but it looks atleast half like mine. Your best friend when working on these things is a digital camera, you can take it apart and photograph your progress. That and plenty of ziplock bags and a sharpie.
If you find your piston has ANY corrosion on it you need to rectify it by either replacing it, or some people polish the pits so they don't tear away at the new seal. This is a temporary fix as they will likely corrode again in the pits where the chrome was damaged. I had a friend machine me new ones (he owed me a favour)
Shaun